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Effects of supraoptimal temperatures on the myxomycetePhysarum polycephalum (1974)

Bernstam, V. A. ; Arndt, S.

Springer

Archives of microbiology 95 (1974), S. 357-363

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ISSN: 1432-072X

Source: Springer Online Journal Archives 1860-2000

Topics: Biology

Notes: Summary In experiments using an inhibitor of protein synthesis cycloheximide it was shown that the thermal injury of thePhysarum polycephalum plasmodia produced by 10 min heatings at 41°C can be repaired without involvement of concomittant protein synthesis. Resumption of the protoplasmic streaming halted by heat shocks served as an indicator of the repair of thermal injury. Repair of the thermal injury attainable only through sclerotization of plasmodia following 10 min heat shocks at 43°C is blocked by cycloheximide as well as by transfer of the heated cultures to a “starvation” medium (no peptone and yeast extract). Three h period of starvation as well as inhibition of protein synthesis for 3 h prior to heating accelerates the heat-induced transformation of plasmodia into sclerotia and lowers the temperature threshold of metabolic transformations required for sclerotization.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF02451777

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